Nuntius Header Widgets

I tried seeking for an answer in another topic, but it was not the right way.
My problem is that on my blog, I was very happy to see that I can put the search widget in the header area. I did it, but when I uploaded a header image of choice, the image got over the widget and not below, making the search untouchable and idle.

I am currently using the simple text version of the header, but I am wondering if there is any way to have this fixed. I tried using a png without a background and with the exact header dimensions. I have also tried putting up a smaller image (didn't work at all), I also tried cutting off a smaller image from a huge image. (all of them png 24 with preserved transperancy) Nothing worked, each time when I tried click the search it reacted to a header click and brought me to the home page.